Endoscopic Anatomy Of Nose o303h

SURGICAL ANATOMY :THE LATERAL NASAL WA st st

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BASAL LAMELLA (BL)

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Ⅲ

Ⅰ

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Uncinate Process

2 processes         Maxillary process         Inferior process

Ethmoidal bulla

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The uncinate process develops reciprocally with the ethmoidal bulla

Torus lateralis

Ethmoidal bulla

Semilunar Hiatus: 2-dimensional curved groove between the uncinate process and the ethmoidal bulla

Ethmoidal Infundibulum               ethmoidal       process       process of

anterior border : lacrimal bone posterior border : anterior surface of the bulla   superior border : frontal recess medial border : entire extent of the uncinate lateral border : lamina papyracea & frontal the maxilla

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A: lacrimal bone P: anterior surface of the ethmoidal bulla   S: frontal recess M: uncinate process L: lamina papyracea

Lateral Sinus When the posterior wall of the bulla ethmoidalis is not in with the basal lamella of the middle turbinate, the suprabullar recess (a space superior to the bulla ethmoidalis) and retrobullar recess (a space behind the bulla ethmoidalis) form lateral sinus (=sinus lateralis of Grünwald)   

Borders A: roof and posterior wall of the ethmoidal bulla

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ebc A:roof and posterior wall of the ethmoidal bulla P:basal lamella of the middle turbinate S:roof of the ethmoid

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Frontal Recess (Frontal Infundibulum): Funnel-shaped narrowing towards the frontal ostium       

                

       

Borders: A: agger nasi P: ethmoidal bulla & 3rd lamella S: ethmoid roof  M: middle turbinate   L: lamina papyracea

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A: agger nasi P: ethmoidal bulla & 3rd lamella S: ethmoid roof  M: middle turbinate L: lamina papyracea

Fontanelle;Pars membrana;Membranous meatus   Bony defect between the uncinate process and the inferior turbinate

Anteri or

Posteri or

Fontanelle & Br of sphenopalatine nerve and artery

Nasolacrimal duct; Hasner valve

5-18mm

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Anterior Ethmoid Cell (4-10): frontal recess cell infundibular cell bullar cell conchal cell extramuralncell (i.e. supradrbital cell, agger nasi cell, Haller cell)

Posterior Ethmoid Cell (1-5): intramural post ethm cell extramural post ethm cell (i.e. Onodi cell)

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Hc

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Sphenoidal Otium: Position        13±3 mm above the floor of sphenoid sinus         10±4 mm below from roof of ethmoid         5±2 mm lateral to the nasal septum         7 cm posteriorly from the nostril margin at 34±4 degree angle to the floor of nasal cavity

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13±3 mm above the floor of sphenoid sinus  10±4 mm below from roof of ethmoid  5±2 mm lateral to the nasal septum 7 cm posteriorly from the nostril margin at 34±4 degree angle to the floor of nasal cavity

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rominences or Bulges from above downwards

  

           

Prominence of the optic canal       Prominence of the internal carotid artery Prominence of the maxillary nerve Prominence of the nerve of pterygoid canal ( vidian nerve)

Bulges within the Sphenoid Sinus in Saggital Section (20%-43%;dehi 6%) (65%-98%;dehi 25%)

(14%-29%)

(29%-48%;dehi 10%)

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